Automatically-timed electrical device



March 25, 1930. J. MULDER 1,751,875

AUTOMATICALLY TIMED ELECTRICAL DEVICE Filed may 2e, 1928 2 sheeis-shegg l I N VEN TOR.

A TTORNEY- March 25, 1930.

J. MULDER AUTOMATICALLY TIMED ELECTRICAL DEVICE Filed May 26, 1928 2 Sheets-Sheet 2 -dlllllllfl INVENTOR. Jny'e Mulde?? BZW A TTORNEYS j titi Patented Mu. 2s, 192.0

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The dpresent invention relates to automatitlmed electrical devices, such as houseappliances, and particularly to automatic switch devices for. breaking a circuit through such an appliance after a predetermined period of operation and to means for varying the timing.

Among the objects of the invention is to simplify such timing means and timin adjustment so as to render them easily an`eco nomically made as well as etiicient in operation. Y

Another object is the application of such devices to household appliances, such as a bread toaster.

Other objects will readily occur to those skilled in the art upon reference to the following description and the accompanying drawings, in which f Fig. 1 is a side elevation ofl a toaster embodylng the present invention.

Fig. 2 is an end elevation thereof.

Fig. 3 is an endview with parts in section and with the end cover plate removed to show the mcehanism. f j' Fig. 4 is a section on line 4`4 of Fig. y3. Fig. 5 is a section on line 5 5 of Fig; 1.- ig. 6 is a section on line (5f-6 'of ig. 5, Figs. 7 and 8 are enlarged detail views of parts of the device.

As indicated in the drawings, the toaster consists of a base member 15' upon which are mounted `in a vertical plane, heating filaments 16 and the bread racks 17 which may be o erated in the usual manner by means of the obs 18. At one end of the toaster will be the usual end plate 19 and at the other end may be a second end plate 20. Outside of the second end plate 20 a chamber will be formed by means of a third end plate 21 and a side wall member 22 which latter on one side of the toaster will be provided with a slot 23 extending from near the bottom up to the top and a part of the way across the top. The extent of the slot 23 will best be noted in Figure. 3.

Inside of the chamber just mentioned is a series of. staggered shelves 25 which extend one over the other from alternate sides of the Serial No. 280,787.

' vided near the hinge with a spring portion 29 for a purpose to be hereinafter indicated.

, Near the center of the shelves they will be supported upon a vertically extending slidable member 30 indicated best in Figures 2 and 5. Any suitable means for supporting the shelves on'the member 30 may be used, such-as the spaced pins 31 shown in Figure 5 or rojections 32 on the side of the shelf vmay e inserted in suitable openings in the member 30. Such projections lare indicated at 32 in Figure 3.

The bottom end of member 30 is bent to a horizontal position and provided with a threaded opening for the reception of a thumb screw 33 rotatably mounted in the bottom of the chamber in a boss 34 and at one side the member 30 willbe provided with an arm 35 to which issecured a spring 36 attached at its other end to the bottom of the chamber, as shown best in Figure 5. By rotation of the thumb screw 33, the inclination of the several shelves may be varied and it is preferred to provide on the member 30 a mark 40 which is visible through a suitable opening 41 in the end plate 21 and the edge of the opening may be graduated, as indicated in Figure 5.

Below the lowermost shelf 25 is a small platform 45 which is formed as a laterally projecting part of a lever 46 located preferably outside of the shelf chamber, the connection between the platform 45 and lever 46 extending through a suitable arc shaped slot 47 in the end plate 21.

This lever 46 is pivoted as at 48 in a switch housing 49 mounted on the base 15 and at its other end is connected to a spring 50 which,

in turn, is connected to the switch arm 51 of a suitable overthrow switch. The other two arms 52 and 53 of the switch member will in one position make contact with the contact members 54 and in its other position break the circuit.

Mounted in the slot 23 is a suitable sliding cup member 60 having a handle 61 projecting to the outside, which cup member is adapted to receive a metal ball 62 and serves to elevate the ball 62 to the dotted line position shown in FigureV 3. When the handle 61 is moved to the upper end of the slot, the cup member is tilted and the ball dropped therefrom on the uppermost shelf 25.

Through the force of gravity, the ball then travels down over the several shelves 25, being somewhat delayed by striking the spring portions 29 and bounding against the shelf ends, until it rolls from the lowermost shelf upon the platform 45. When the ball drops upon the platform 45, its weight and the force of its blow wilLcarry down the platform to the dotted line position and in so doing, causes the switch arms 52 and 53 to move to their dotted line position and thus break the circuit.

When it is desired to re-make the circuit, the ball is lifted by means of a handle- 61 and in the rst part of its movement, carries up with it the platform 45 by virtue of the small extension 45a with which the ball contacts and thereby throws the switch lever 53 back to the full line position.

If it is found that the ball in its downward trip requires more time, the member 30 is lifted by means of the thumb screw 33 and thereby decreases the inclination of the platforms 25; lowering the member 30 will correspondingly shorten the time of the closed circuit position of the switch.

Now havin ldescribed the invention and the preferred orm of embodiment thereof, it is to be understood that the said invention is to be limited not to the specic details herein set forth but only by the scope of the claims which follow.

l. A timing device for electrical appliances, comprising an overthrow sw1tch adapted to be actuated by the movement of a lever in a vertical plane, a platform on said lever, and means for causing a weight to drop on said platform and thereby actuate said lever and cause the latter to actuate said switch, said means comprising a vertical series of inclined shelves above said platform, each shelf inclined toward the one next below with the lowermost inclined toward said platform, and a spherical weight adapted 4to be placed upon the topmost shelf and to roll over said shelves in series and drop upon the said platform whereby to actuate the said lever and thereby said switch.

2. A timing device r electrical'appliances, comprising an overthrow switc adapted to be actuated by the movement of menare a lever in a vertical plane, a platform on said lever, and means for causing a weight to drop on said platform and thereby actuate said lever and cause the latter to actuate said switch, said means comprising a vertical series of inclined shelves above said platform, each shelf inclined toward the one next below with the lowermost inclined toward said platform, and a spherical weight adapted to be placedupon the topmost shelf and to roll over said shelves in series and drop upon the said platform whereby to actuate the said lever and thereby said switch, areceiver into which said weight is adapted to roll from said platform after switch actuation, means for lifting said weight and depositing it upon the topmost shelf, and means cooperating with the last mentioned means to return said platform to weight receiving position when said lifting is being done.

3. A timing device for electrical appliances, comprising an overthrow switch adapted to be actuated by the movement of a lever in a vertical plane, a platform on said lever, and means for causing a weight to drop on said platform and thereby actuate said lever and cause the latter to actuate said switch, a vertical series of inclined shelves above said platform, each shelf inclined toward the one next below with the lowermost inclined toward said platform, a spherical weight adapted to be placed upon the topmost shelf and to roll over said shelves in series and drop upon the said platform whereby to actuate the said lever and thereby said switch, and means for changing the inclination of said shelves.

4; A timing device for electrical appliances, comprising an overthrow switch adapted to be actuated by the movement of a lever in a vertical plane, a platform on said lever, and means forI causing a weight to drop on said platform and thereby actuate said lever and cause the latter to actuate said switch, said means comprising a vertical series of inclined shelves above said platform, each shelf inclined toward the one next below with the lowermost inclined toward said platform, a spherical weight adapted to be placed upon the topmost shelf and to roll over said shelves in series and drop upon the said platform whereby to actuate the said lever and thereby said switch, means for delaying the progress of said weight when passing from one shelf to a succeedmg shelf, and means -for changing the inclination of said shelves.

5. A timing device for velectrial appliances, comprising an overthrow switch adapted to` be actuated by the movement of 'a lever in a vertical plane, a *platformv on lll@ lli

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said lever, and means for causing a weight to drop on said platform and thereby actuate h said lever and cause the latter to actuate said.

switch, said means comprising a vertical se- 

